Thermostatic fire-signal.



A. B. JONES. THERMosTATIc Fmi SIGNAL. yAPPLICATION FILED IAR. 30. 1914.

1,213,654. l Paten@ Jan. 23,1917.

@lf/if. I

Great loss of life has been through fires in hotels and UMTED sTArEsrrrf rarrrA FFICE.

ARCHIBALD B. JONES, 0F SAN FRANCISCO, CALIFORNIA.

l'rumenios'rn'irrc Finn-sumen.

' speciaca'aonof Letters Patent.

Application lezl March 30, 1914. Serial No. 828,375.

will enable others skilled in the art to which it appertains to make anduse the same.

My invention relates to improvements in thermostatic fire signals andresides in the provision of a device which will operate to signalautomatically by the heat given forth from a' starting f conflagration.

yAn important lobject of my invention is to provide a thermostaticsignal of the character described which may be regulated to operate atdifferent temperatures.

brought about on ship board, and my invention aims to provide means `forwarning the occupants or passengersas the case may beof a startingconfia'gration, thus enabling the person or persons when warned toextinguish theiireor to give the proper alarm.

Another important object of my invention is to provide-a signaling meansof the character described which may be arranged in great numbers atdifferent points throughout the ship, house or building to which it isyapplied, thus insuring detection of a starting re at any point in theship or building.

Anotherimportant object of my invention is to provide signaling means ofthe character described which is simple as to construction, reliable andeiicient in operation, cheap to manufacture'and install and which isentirely automatic in its operation.

The above and additional objects are accomplishedby such means as areillustrated in the accompanying drawings, described in the followingspecification and then more particularly pointed out in the claim whichis appended hereto and forms a part of this application.

l/Vith reference to the drawings, wherein I have illustrated thepreferred embodiment of my invention as'it is reduced to practice,

and throughout the several views of'vvhichr similar reference numeralsdesignate correspending parts: Figure l 1s a front elevation of mydevice showing the electrical circuit therefor in diagram. Fig. 2 is atransverse sectional View taken through the means for adj ustablysupporting the adjustable contact rod or electrode, and Fig. 3 is afragmentary vertical sectional view metically sealing the openingthrough which the adjustable contact rod or electrode is inserted intothe mercury tube of the thermometer.

Referring to the drawings, the numeral 1 designates as an entirety athermometer Patented aan. 23, 1917.l

ofthe means for herconsistin of ar base or wall plate 2 which is provied with the usual characters and graduations designated 3 as anentirety.

The usual glass mercury container 4 having mercury 5 therein is disposedin the usual manner upon the board 2. The upper end of the tube 4 isenlarged to provide a shoulder 6 and cup 7 A contact rod or electrode 8is mounted within the tube 4 and is eX- tended through the cup 7 formedas described. This contact rod or electrode 8 is adjustable through asleeve or collar 9 carried upon one en of an angularsupportin arm l0.The supporting arm 10 is secured by suitable fastening means 11 to theupper portion of the wall board 2. A set screw 12 copeating with thecolla-r or sleeve 9 provides for the securing of the rod or electrode y8 in adjusted position as will be readily seeny ywith reference to Figs.l and 2 in the, drawings. j

As a means forhermetically sealing the opening in the tube 4c and intowhich the rod 8 is extended I providea flexible washer or collar 13 thatis provided with a small cen` tral aperture of suliicient size toreceivethe rod 8 and designed torestupon the shoulder 6 formed as described.The outer face of this washer 13 is disposed in inwardly spaced relationto the outer edge of a cup 7 to provide a space into which is pouredparaiin or some other suitable sealing medium.' The parafiin is pouredas described after ther desired adjustment of the rod 8 is had, thusinsuringthe proper sealing of the tube 4.

An electrical circuit is employed in connecti'on -with the thermometer 1and consists of a battery, or other suitable source of current le havingone conducting wire 15 leading to a suitable annunciator 16 and fromthence by means of a conductor 17 to a binding post lJUS/:formed on theouter end of the Contact 'rod or electrode 8. A. conducting length 19comprising the other side of the circuit connects the battery 14 with abinding post 2G carried on the lower portion of'the Wall board 2 of thethermometer l. A suitable electrode Wire or rod 2l is connected at oneterminal With the binding post20 and at its other terminal is disposed"Within the lower ball portion 22 of the tube l for the mercury 5. rfhiselectrode 2l 1s grounded in the mercury 5 and the openlng through theball portion 22 of the tubel `the mercury 5 in the tube 4 of thethermometer l rises to the point at which the lower end of the electrode8 is disposed, the circuit will be closed and the annunciator operated.

It will be noted ,with reference to the fore Doing descri tion and accoman in draW- .e

ings that the annunciator may be arranged to operate according to theheat temperature desired. r)This action is had by the adjustmentpermitted the electrode 8. The electrode 8 may be arranged so that itsinner operative terminal is disposed adjacent to certain points of thetemperature scale, for instance, if arranged to operate at de grecs theelectrode terminal is disposed opposite to the 60 degree graduation andwhen the mercury rises to this point the circuit is closed and theoperation of the annunciator is brought about. p

lt will be noted with reference to the `foregoing description andaccompanying drawings that my device may be used With good results inconnection with battleships and forts or" other places Where greatquantities of explosives are stored, The thermometer l with thecoperating parts maybe placed adjacent to the magazinesfor theexplosives While the annunciator may be arranged `in the captains oroficers7 quarters. Thus whenl a-dangei'ous temperature is had adja centto the magazine the oiicers or captain will be notified.

It will thus be seen that my device -will be of great use in connection\with powdermagazines and the-like. My device is particularly desirableior use in the connection before described tor' reason of the adpistument permitted the electrode whereby the mienne device will operate atdifferent' heat temperatures. This point is. considered one ofthe mostessential of my invcntion.

and yinexpensive signaling device which will operate in a reliable and:expeditious mannereand which is cheap to manufacturer My improveddevice may lie-readily used,

in connection with return call annunciator systems ofdiiferentcharacters.

In reduction to practice, I have found that the formfole my invention,.illustrated in the drawings and referred to in the above description, asthe preferred embodiment, is the most efficient and practical; -yetrealizing that the conditions concurrent with the adoption'of mydevice'vvill necessarily vary, l vdesire to emphasize the factthatvarious minor changes in details of construction, proportion andarrangement of parts may be resorted to, when required, Withoutsacrificing any of the advantages of my invention, as defined in theappended claim.v

What is claimed isi-e A thermostatic signaling'device including agraduated base plate provided at one end with a binding post, a mercurytube supported on the base plate and provided at its upper end with anintegral cup, an electrode embedded in the mercury at one end of thetube and connected with the said binding post, a transverseiy disposedsupporting arm located beyond the other end of the tube and y' securedat one end to the base plate and pro. vided adjacent to such attachedend with an outward bend and having its other endffree and provided witha collar arranged in alinement with the said tube, a clamping screwcarried by the collar, a contact rod passing through the collar andadjustably clamped by the said screw and extending through the cup intothe said tube, said rod being provided at its outer end with a bindingpost, a sleeve-iitted in and bearing-'against the bottom of the said cupand pierced by the ros said rod,v and a plastic seal contained Withinthe cup and supportedby the said sleeve.

1n testimony whereof I aiix my signature in presence of two Witnesses.

, .ancnieann e. Joules.v Witnesses: A Y

JAMES S; MULVEY, GEORGE W. Las.

